CI job for building docker images for tutorial on main

[tylerjw]

Description

Here is the docker job we talked about yesterday. This should build a docker image on the main branch in CI for rolling, humble, and iron and push to the github container registry on pushes to main. The docker tag will be ghcr.io/ros-planning/moveit2:main-tutorial-${ROS_DISTRO}. I made it a separate workflow from the docker one because I want this to also run in PRs as a CI job and separate from the normal CI one because I only want it to run on pushes to the main branch.

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (1e4721a) 50.47% compared to head (d0b9d02) 50.38%.

❗ Current head d0b9d02 differs from pull request most recent head ce5ec4e. Consider uploading reports for the commit ce5ec4e to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2449      +/-   ##
==========================================
- Coverage   50.47%   50.38%   -0.08%     
==========================================
  Files         385      385              
  Lines       31829    31829              
==========================================
- Hits        16062    16034      -28     
- Misses      15767    15795      +28     

see 3 files with indirect coverage changes

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[MarqRazz]

I locally built this image on my machine and it works! Thanks @tylerjw!